Nut-lock



Pawnd Mar, 22, 1921.A

y UNITED STATES PAH-:NT OFFICE.

HARRY L. ".IIHIOINIIAS,` 0F WASHINGTN, PENNSYLVANIA,

NUT-Leen.

" `.ippncainm alec December 22, 191e. serial No. 346,469.

i 'o MZ w lio/m, t may concern,

Be it known that I, HARRY L. THOMAS,

citizen of the United States, residing, at lifashington, in the county of`Washington and State ol Pennsylvania, have invented certain y new and useful Improvements in NutLocks, oi? which "the yfollowing is a speciiication, reference being had to the accompanying drawings.

This invention relates to nut locks and has :for its object to provide a nutlock which can be securely locked at any point ony the bolt.

Another object is to `provide a nut lock oi" this character wherein the bolt and nut have grooves in their outer surfaces parallel to each other 'tor the reception of a single locking key. y

Another object is to provide a nut lock of this character including a shank having a recess in its inner marginal edge for the reception oi a portion of the locking `key when the latter is applied to the nut and holt, to relieve the key of the pressure oit the secured nut. l

Another object is to provide a nut lock oit' lthis character including a locking pin capable ofperi'orming two separate and distinct locking operations. p

A still further object is to provide a nut lock of this character which can be locked by one or two methods, and including a novel washer which in addition to relieving the locking pin of pressure, locks one end of the pin in a recess therein, in one of the locking methods.

With these and other objects in view the invention consists of the improved construe tion to be hereinafter more particularly de scribed, fully claimed and illustrated in the accompanying drawing in which:

Figure 1 is a vertical section of the in vention applied to a bolt, and showing one of the methods of locking. l

Fig. 2 is a plan view.

Fig. 3 is a detail view of the washer.

liig. 4: is a vertical section showing another locking method.

The invention. consists of a bolt having a head 6 and a threaded shank 7. A groove 8 is provided in the shank 7 and extends longitudinally thereof. This groove is in tended to receive both ends oi a locking pin to be hereinafter described.

A washer 9 is intended to be disposed on the bolt and in engagement with the object Specification of 'Letters Patent.

lz'ttelited Briar'. 22, 1.921.

through which thebolt is passed. The inner marginal. ed ot the washer formed by the center opening thereof is provided with a recess 10, `the purpose ot which will be here`- inatter explained.. Threaded on the bolt, is nutil, one end oisaid uut being arranged toengage the Washer 9. il plurality of thel spaced canted grooves 12 are formed in the periphery or' the nut, and extend in angular relation, to the groove 8 of the shank 7.

In order to secure the nut to the bolt a locking pinv'l is provided. This pin consists of an elongated member having a tapered end 14n and a `fiat end 15, and is capable or' being applied in two ways each oii which :firmly locks the nut. The first method of locking' consists of placing the washer on the bolt in engagement with the object to be secured and rotating the nut firmly in engagement with the washer. The

end portion 15 oit the pin is then inserted in the groove 8, between the bolt and the inner surface of the nut. The remainder of the pin is then bent over the outer surface oi? the nut and through one oit the peripheral grooves 12, into the recess 10 of the washer and the portion of the groove "5` with which the recess 1() registers. By this means the end of the recess 10 engages Athe inwardly extending portion of the pin and prevents disengagement thereof from the nut. It is of' course obvious that the washer 9 is slightly thicker than the pin 13 so that the portion of the key within the recess 10 does not receive the pressure of the secured nut, and at the same time is held from disengagement from the bolt by the washer. The other method of locking consists of placing the end portion 15 of the pin 13 inthe groove 8 and recess of the washer 10. The nut 11 is then applied and rotated into en- `gagement with the washer 9. The end'por tion-14; of the pin is then passed over the nut into one of the peripheral grooves 12 and then extended inwardly into the groove S in right angular relation to the longitudinal axis of the'portion 15. In both locking methods, the pin entirely surrounds a portion of the nut.

From the foregoing it will `be readily seen that this invention provides a simple and effective nut lock which can be locked at any point longitudinally of the bolt. In addition to this it includes a novel form of `washer which not only prevents the nut from injuring the object through which the llt) boit passes, but prevents the nut from applyng pressure lto the pin, and also serves to retain the pin in engagement With the nut. The looking pin When appliedrforms substantially e ring around one portion of the nut, both ends of the pin being disposed Within the groove of the bolt so that the)7 are proteeted in their looking operation.

YVhat is Claimed is A vnut look comprising a longitudinally gro'o'vedl bolt, u. washer mounted on said bolt and provided with a recess Communicating with the central opening thereof adapt" ed to be ejlined with the groove of the bolt.

e nut threaded on said bolt and having spaced eanted recesses formed in itsouter HARRY L. THOMAS. 

